What's new in jQuery 1.4? -

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what's new in jquery(including ui) , have problems(using ui dialog , datepicker) when switch 1.4(and 1.8.2) ?

there breaking changes. important point make sure plugins using has been updated 1.4 support, , use updated versions only. shouldn't have issues, or minor issues can solve. benefits (for example performance) worth of it.


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